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Reference Manual for the Model Wireless ADSL Firewall Router DG834G
4
Glossary
Netmask
A number that explains which part of an IP address comprises the network
address and which part is the host address on that network. It can be
expressed in dotted-decimal notation or as a number appended to the IP
address. For example, a 28-bit mask starting from the MSB can be shown as
255.255.255.192 or as /28 appended to the IP address.
Network Address
Translation
A technique by which several hosts share a single IP address for access to the
Internet.
packet
A block of information sent over a network. A packet typically contains a
source and destination network address, some protocol and length
information, a block of data, and a checksum.
PPP
See
Point-to-Point Protocol.
PPPoA
See
PPP over ATM
PPPoE
See
PPP over Ethernet
PPP over ATM
PPPoA. PPP over ATM is a protocol for connecting remote hosts to the
Internet over an always-on connection by simulating a dial-up connection.
PPP over Ethernet
PPPoE. PPP over Ethernet is a protocol for connecting remote hosts to the
Internet over an always-on connection by simulating a dial-up connection.
PPTP
Point-to-Point Tunneling Protocol. A method for establishing a virtual private
network (VPN) by embedding Microsoft’s network protocol into Internet
packets.
PSTN
Public Switched Telephone Network.
Point-to-Point
Protocol
PPP. A protocol allowing a computer using TCP/IP to connect directly to the
Internet.
RADIUS
Short for Remote Authentication Dial-In User Service, RADIUS is an
authentication system.
Using RADIUS, you must enter your user name and password before gaining
access to a network. This information is passed to a RADIUS server, which
checks that the information is correct, and then authorizes access. Though not
an official standard, the RADIUS specification is maintained by a working
group of the IETF.
RFC
Request For Comment. Refers to documents published by the Internet
Engineering Task Force (IETF) proposing standard protocols and procedures
for the Internet. RFCs can be found at www.ietf.org.
RIP
See
Routing Information Protocol.
Page 267 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
Glossary
5
router
A device that forwards data between networks. An IP router forwards data
based on IP source and destination addresses.
Routing Information
Protocol
A protocol in which routers periodically exchange information with one
another so that they can determine minimum distance paths between sources
and destinations.
SSID
A Service Set Identification is a thirty-two character (maximum)
alphanumeric key identifying a wireless local area network. For the wireless
devices in a network to communicate with each other, all devices must be
configured with the same SSID.
This is typically the configuration parameter for a wireless computer card. It
corresponds to the ESSID in the wireless Access Point and to the wireless
network name.
See also
Wireless Network Name and ESSID
subnet mask
See
netmask.
Universal Plug and
Play
UPnP. A networking architecture that provides compatibility among
networking technology. UPnP compliant routers provide broadband users at
home and small businesses with a seamless way to participate in online
games, video conferencing and other peer-to-peer services.
UTP
Unshielded twisted pair. The cable used by 10BASE-T and 100BASE-Tx
Ethernet networks.
VCI
Virtual Channel Identifier. Together with the VPI, defines a Virtual Channel
through an ATM network. Used by ATM switching equipment to route data
through the network.
VPI
Virtual Path Identifier. Together with the VCI, defines a Virtual Channel
through an ATM network. Used by ATM switching equipment to route data
through the network.
WAN
See
wide area network.
WEP
Wired Equivalent Privacy. WEP is a data encryption protocol for 802.11b
wireless networks. All wireless nodes and access points on the network are
configured with a 64-bit or 128-bit Shared Key for data encryption.
wide area network
WAN. A long distance link used to extend or connect remotely located local
area networks. The Internet is a large WAN.
Wi-Fi
See
802.11b. A trade name for the 802.11b wireless networking standard,
given by the Wireless Ethernet Compatibility Alliance (WECA, see
http://
www.wi-fi.net
), an industry standard group promoting interoperability among
802.11b devices.
Page 268 / 268
Reference Manual for the Model Wireless ADSL Firewall Router DG834G
6
Glossary
Windows Internet
Naming Service
WINS. Windows Internet Naming Service is a server process for resolving
Windows-based computer names to IP addresses. If a remote network
contains a WINS server, your Windows PCs can gather information from that
WINS server about its local hosts. This allows your PCs to browse that remote
network using Network Neighborhood.
WINS
See
Windows Internet Naming Service.
WPA
Wi-Fi Protected Access (WPA) is a specification of standards-based,
interoperable security enhancements that increase the level of data protection
and access control for existing and future wireless LAN systems.

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